BEST WAY TO BUY,  A SELECTION OF 3 SIZES.  FILLS THE TOOL BOX WITHOUT BUYING 300 OF THESE.  CRL TYPE,  BUT THE RED 1/8 SHIM HAS A TAPER ON THE TIP SO IT SLIDES IN MUCH BETTER, SO MAY BE ANOTHER SUPPLIER.  24 PIECES OF EACH.  BLUE PSH36, RED PSH38, BLACK PSH34.  wE SHIP EVERY OTHER WORK DAY.